Atomizing nozzle



w. c ELZE ATGMIZING NOZZLE Filed Dec. 8, 1925 lllllHH wa y m d v 0 104 R Y w m NE W m w A. m

Patented Jan. 3,1928.

UNITED STATES PATENT OFFICE.

WALTER C. ELZE, FOREST HILLS, NEW YORK, ASSIGNOB TO HAUCK EANUFAUIUE- ING COMPANY, OF BROOKLYN, NEW YORK, A COBIORA'IION 01 NEW YORK.

ATOMIZING NOZZLE.

Application filed December a, 192:. Serial 1Tb. 74,047.

The invention relates to a nozzle especially suitable for use with oil burners, and is designed for atomization of the fuel oil; but it is to be understood that the nozzle is equally well adapted for atomizing other liquids. More particularly, the invention relates to the suction type of nozzle, that is to say, one which may be utilized at an appreciable elevation above the source of liquid or oil supply to lift the same, said supply being usually at atmospheric pressure or at a pressure slightly in excess thereof, whilethe atomizing medium (air or steam) is supplied at a substantial pressure, say from 10 lbs. to 125 lbs. per square inch. It will be understood, however, that in some instances it may be desirable to. also supply the liquid to be atomized at an appreciable pressure.

The invention has for its object a nozzle whereby perfect atomization of the liquid may be secured and which'nozzle shall be efficient in operation and of simple and rugged construction, allowing also of ready and convenient disassembly as for cleaning or'renewal purposes.

A further object of the invention consists in the provision of means by which there is imparted to the incoming atomizing medium a rotary or whirling motion of relatively high velocity to more effectively break up the liquid particles and mix the same with the atomizing medium so that the final mixture as discharged from the tip of the nozzle will comprise the completely atomized liquid and atomizing medium, the mixture still having the whirling motion initially imparted to the said atomizing medium.

To this end, the invention comprises a nozzle member having a tapering or flaring duct for the atomizing medium and a tapering or flaring duct for the liquid supply, the latter surrounding the former and the two ducts uniting in a common outlet duct flaring oppositely to the aforesaid ducts. By this expedient, an area of reduced pressure is obtained substantially at the point of intermingling of the two fluids, whereby it has been possible to secure a greatly increased of vacuum (as high as 2 1) for lifting the liquid, as well as to greatly increase the velocity of the fluids for more perfect atomization of the liquid.

The nature of the invention, however, will best be understood when decribed in connection with the accompanying drawings, in which .Fig. 1 is an elevation of the improved nozzle.

Fig. 2 is a plan, and Fig. 3 an underneath view thereof. a

. Fig. 4 is a, vertical section thru the nozzle. ltig. 5 is an end view of the plug member which may be employed to impart to the atomizing medium a whirling motion.

Referring to the drawings, designates a body member as a block or cylinder centrally bored to provide an axial air duct 11 internally threaded to receive a conicaloutlet member 12 which is likewise centrally bored as at 13to register with the duct 11, and to provide a reservoir for the incoming air. The latter is to be delivered from the outlet member 12 thru an axially disposed orifice 1& at its outer end. Air or other gaseous medium is supplied to the block 10 thru a pipe 15 threaded therein, a port 16 extending thru a portion of the block into the duct 11. I prefer, also, to introduce a plug 20 in the air supply thru the nozzle; and the same may conveniently be threaded into the inner end of the outlet member 12, said plug being provided with a plurality of ports 21 thru which the air from the duct 11 passes into the reservoir 13. These ports pass thru the plu at an an le to its longitudinal axis and t us cause t e air delivered into the reservoir 13 to assume a rotary or whirling motion of considerable velocity, the air then passing into the reservoir 13 and out thru the orifice 14. In accordance with the invention, the far end of the reservoir 13 tapers down to the orifice 14 which 18 substantially constricted to cause the gaseous medium to. assume a high velocity at this point.

About the outer end of block 10 and outlet member 12 is mounted a ca member 25, as by screwing the same over t e said outer end of the block, as shown. This cap member is likewise centrally bored to provide with the outlet member 12 a surrounding chamber or space 26 annular in character and tapering outwardly, that is to say, to provide a constricted portion in roximity to the orifice 14. Into the chem r 26 is arranged to be delivered the oil or other liquid medium to be atomized as thru a port 27 passing thru a portion of the block 10,

and to which part connection is made from a suitable source of supply (not shown) as by means of a pipe 28.

The reduction in pressure effected at the orifice 14, due to the considerable increase of velocity of the atomizing medium at this point, provides for the sucking of tne'oil into he chamber 26 and its delivery to the vicinity of said orifice where-it unites with and is broken up by the said stream of atomizing medium which, preferably, also has the whirling or rotary motion here1nbefore set forth. The two fluids with liquid portion thoroughly atomized are then delivered from the improved nozzle, with v the whirling motion initiallyimparted to the atomizing medium, thru an axial outlet 29 at the outer end of the cap 25. This outlet is arranged to flare outwardly from the vicinity of the orifice 14, thus forming a double venturi-one for the atomizing medium and the other for the liquid medium, the outlet 29 being common to the two pertions or chambers 13 and 26.

The arrangement hereinbefore described lends itself admirably to an inexpensive and substantial construction, the outlet member 12, carrying the plug 20, screwing into the block 10 and shouldering against its upper reduced and threaded end, while the cap 25 screws over said end to abut the shoulder 30 provided on the block. To disassemble the nozzle, therefore; as for cleaning purposes or for renewal of the out'let member and cap, it is necessary merely to unscrew the said members as .well as to remove the plug,

if the latter has been employed.

1. An atomizing nozzle, comprising an out-let member with a longitudinal duct therethru for an atomizing medium and tapering down to an orifice, and a cap member surrounding said outlet member to providea vacuum chamber for a liquid medium "and having an outlet duct coaxial with the duct of the said outlet member and flaring outwardly, said outlet duct and orifice being located in proximity to each other, the lat- .ter being at a point not in advance of the former and the said chamber provided between the outlet member and the cap member tapering down to the said orifice to provide an annular constricted outlet at this point whereby the liquid medium is caused to assume a high velocity thereat.

2. An atomizing nozzle, comprising an outlet member with a longitudinal duct therethru for an atomizing medium and tapering down to an orifice, means included in the outlet member to impart a rotary motion to the gaseous medium passing therethru, and a cap member surrounding said outlet member to provide a vacuum chamber for a liquid medium and having an outlet duct coaxial with the duct of the said outlet member and flaring outwardly, said outlet and orifice being located in proximity to each other, the latter being at a point not in advance of the former and the said chamber provided between the outlet member and the cap member tapering down to the said orifice to provide an annular constricted outlet at this point whereby the liquid medium is caused to assume a high velocity thereat.

3. An atomizing nozzle, comprising an outlet member with a longitudinal duct therethru for an atomizing medium and tapering down to an orifice a plug member closing off the inner end of the outlet member and having ports therethru at an angle to its longitudinal axis, and a cap member surrounding said outlet member to provide a vacuum chamber for a liquid medium and having an outlet duct coaxial with the duct of the said outlet member and flaring outwardly, said outlet duct and orifice being located in proxly disposed duct coaxial with the atomizing" medium duct of the body member and tapering down to an axial orifice at the outer end, and a cap member adapted for threaded engagement with the end of the body member and fitting over the said outlet member to provide a chamber for a liquid medium and having an outlet duct coaxial With the duct of the said outlet member and flaring outwardly, said outlet duct and orifice being located in proximity to each other and the said chamber provided between the outlet member andthe cap member tapering down to the said juxtaposed orifice and outlet duct.

In testimony whereof I afiix my signature.

WALTER C. ELZE. 

